Let's say I write a book called "My Awesome Comments from HackerNews, Unabridged" (MACFHU) using Microsoft Word.
And I send that to my publisher, retaining all rights to publish the book still.
Then I adapt MACFHU for iBooks using the iBook Author tool. Would I then be prohibited from selling my book in the iBookstore because it's already available in hardcover? If I published it first in iBookstore, would my publisher be prohibited from publishing it in hardcover?
Or does the iBooks EULA basically say: "This is a specialized tool that you should use to publish books on the iPad." You can certainly publish your content on other platforms as well, but you'll need to format it using other tools. Check out InDesign, for instance.
1) Apple hasn't made clear enough that by using "iBooks Author", the only distribution channel you can use is Apple (de facto in that you must pay them, regardless of how you distribute).
2) There is disagreement that this is a good direction at all.
Point #1 is the one made by the author of the submission. With regard to point #2, I feel that Apple should be free to do what they want with their platform. I also feel that people should be free to openly disagree with them.